mozilla-lists.mbou...@spamgourmet.com wrote on 28-01-17 15:27:
Ray_Net wrote:
I have a big image 1852 pixels x 1852 pixels
When I use in html <img alt="xxxx" src="logo.jpg" height="79"
width="79" border="0"/>
The rendering by SM is superb
BUT using this have a side effect that when the end-user have this
picture on the web-page ... He downloaded the original picture
1852x1852 which is 2.042 KB
To avoid this, I use Irfanview to shrink the picture to a 79 pixels x
79 pixels so the end-user download this modified picture which is 14
KB
And the rendering of this picture <img alt="xxxx"
src="logo-small.jpg" height="79" width="79" border="0"/> by SM is
poor.
I wonder if perhaps the "79x79" image is actually being displayed at
more than 79x79 pixels on screen, giving better quality. Do you have
the zoom in SeaMonkey set to 100%? Or are you using a high-DPI
monitor? I'm not sure if certain CSS styling or other things might
also affect the scaling.
If, for example, SeaMonkey's zoom was set to 200%, I'd expect that
image to be displayed at 158x158 pixels. A large image scaled down to
158x158 pixels for display, is going to look better than a 79x79 pixel
image scaled up to 158x158.
The zoom was and is always at 100%
I have used 79x79 because I have other "logo" on the same line, so each
logo have the same height 79.
You can see the result at the end of this page:
http://www.randoevasion.be/index.php?lang=fr
Is it possible that SM download the logo.jpg picture - then applied
the reduction to 79x79 - then save this new file somewhere - before
showing it in the final page ?
Can I retrieve this picture.file ? Or have you another bright idea ?
As others have mentioned, the scaling algorithm used in your image
editor can have an impact on the final quality.
If you want to capture the image SeaMonkey actually displays, you
should be able to press "Print Screen" on the keyboard and paste into
an image editor. Or some image editors have a screen-capture function
within the application (GIMP does, at File > Create > Screen Shot, I
don't know about Irfanview). Then crop the screen capture to just the
image you want and save it. You'll also find out that way whether it's
really being displayed at 79x79 pixels on screen or something more.
I had used this method PrtSc but the result was poor.
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